As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT INTO CRW FROM ATL, AT APPROXIMATELY 20,000 FEET THE CREW RECEIVED A 3A HYD LOW PRESS CAUTION MESSAGE. THE QRH WAS COMPLIED WITH AND AN EMERGENCY WAS DECLARED. THE AIRCRAFT DIVERTED TO TRI AND LANDED SAFELY. MAINTENANCE REMOVED AND REPLACED THE 3A HYDRAULIC PUMP. OPERATIONAL AND LEAK CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)